title: Reinsemination in human IVF with fresh versus initial semen: a comparative study.
abstract: In the event of non-fertilization of oocytes at the first insemination, repeat insemination is often successful in the IVF procedure. Nevertheless, the value of reinsemination is still controversial. In 56 out of 132 (42%) women treated in our IVF-ET Unit for mechanical infertility by identical induction and aspiration protocols, reinsemination of one or more ova was required. They were divided into two groups. Group I: 79 oocytes from 32 women who were reinseminated with initial semen 24 hours following primary insemination. Group II: 57 oocytes from 24 patients who were reinseminated with fresh semen 24 hours following primary insemination. Fertilization, cleavage and pregnancy rates differed significantly in group I as compared to group II (21.2%, 37.3%, p less than 0.005; 18.6%, 31.9%, p less than 0.001; 18.4%, 29.1%, p less than 0.001). We conclude that reinsemination is a beneficial procedure in cases of non-fertilization of oocytes at the first insemination. Furthermore, the use of fresh semen is preferred to achieve higher fertilization, cleavage and pregnancy rates.
authors.affiliation: Sherman Fertility Institute, Golda Meir Medical Center, Hashron Hospital, Petah Tikva, Israel.
authors.forename: J
authors.initials: J
authors.lastname: Ashkenazi
authors.forename: D
authors.initials: D
authors.lastname: Feldberg
authors.forename: D
authors.initials: D
authors.lastname: Dicker
authors.forename: M
authors.initials: M
authors.lastname: Shelef
authors.forename: G A
authors.initials: GA
authors.lastname: Goldman
authors.forename: J A
authors.initials: JA
authors.lastname: Goldman
mesh_terms: D005069:Evaluation Studies as Topic; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D011247:Pregnancy; D012661:Semen